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- van Aarle, C. (author) doctoral thesis 2024
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van der Sar, S.J. (author)Photon-counting detectors (PCD) for medical X-ray computed tomography (CT) are designed to measure the number of X-ray photons incident on a detector pixel as well as the energy of the individual X-rays. They are expected to yield improvements in image quality for a given radiation dose, and to offer opportunities for spectral imaging beyond...doctoral thesis 2023
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Plokker, M.P. (author)Tm<sup>2+</sup>-doped halides exhibit excellent properties for use in Luminescence Solar Concentrator (LSC) applications. Such LSCs consist of a glass waveguide with small Copper-Indium- Selenide (CIS) solar cells attached to its edges. The waveguide contains a luminescent coating based on a Tm<sup>2+</sup>-doped halide, whose 4f125d1 absorption...doctoral thesis 2021
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Merkx, E.P.J. (author)A luminescent solar concentrator (LSC) is a concept from the 1970s that can find novel application as an electricity-generating window. An LSC converts sunlight to light of a different color by a process called luminescence. This light is transported to the edges of the LSC, where photovoltaic cells convert this incoming light to electricity....doctoral thesis 2020
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Lyu, T. (author)In this thesis, we have studied two types of charge carrier capturing and detrapping processes: (a) electron capturing and electron liberation; (b) hole<br/>capturing and hole liberation. Both the (a) and (b) processes can be utilized for the rational design of afterglow and storage phosphors in different compounds.doctoral thesis 2020
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Wolszczak, W.W. (author)In many aspects measurement of the α/β ratio has advantages over other methods. It provides higher precision and higher density of excitation than is available with Compton or photoelectric effect electrons. It has been shown that the α/β ratio follows the same trends and patterns as previously found for nonproportionality of electron/ gamma...doctoral thesis 2019
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Luo, H. (author)In this thesis, two different charge carrier trapping and detrapping processes are<br/>investigated: (1) electron trapping and electron release; (2) hole trapping and hole<br/>release. Both of these two processes can be used to “deliberate design” afterglow<br/>phosphors or storage materials.doctoral thesis 2017
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Awater, R.H.P. (author)Scintillation materials convert high-energy radiation into many visible photons and, in combination with a photodetector, are used as ionizing radiation detectors. Since the discovery of ionizing radiation, there have been intensive research efforts in finding new, better performing scintillators, resulting in the development of a large variety...doctoral thesis 2017
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Ter Weele, D.N. (author)A study of fast scintillating materials to be applied in future generations positron emission tomography (PET) scanners. The aspects that govern the timing resolution achievable with scintillating crystals were evaluated. This was studied experimentially, using very advanced high speed facilities like a 100 ps resolution pulsed X-ray generator,...doctoral thesis 2015
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De Jong, M. (author)Photovoltaic devices are a widely available, long lasting means of generating sustainable energy. Unfortunately, the integration of such devices into society is to date still limited. This is in part due to the much less than optimal efficiency of conversion of sunlight to electricity, but also by the physical limitations of integrating...doctoral thesis 2015
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- Ten Kate, O.M. (author) doctoral thesis 2014
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Kars, R.H. (author)This thesis comprises analyses of mineral physics with an application in geology and archeology. The thesis contributes to the development of feldspar luminescence dating methods in order to extend the applicable age range of feldspar luminescence dating in the Quaternary (last 2.6 Ma). The research is divided into three parts: 1) Understanding...doctoral thesis 2014
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Alekhin, M.S. (author)Scintillators are used for the detection of ionizing radiation. Despite decades of intensive search and numerous compounds discovered, there is still a need for materials with improved properties. Recently, several new scintillators with excellent light yield, energy resolution, and proportionality have been discovered. Among them are Eu2+ doped...doctoral thesis 2013
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Quarati, F.G.A. (author)LaBr3 has been developed into large volume scintillator detectors within an ESA and TU Delft programme during this thesis work. The programme, which aimed at the space applications of LaBr3, also led to extensive experiments within a collaborative framework which included representatives for all the development aspects, i.e., from crystal...doctoral thesis 2013
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Khodyuk, I.V. (author)A scintillator is a transparent material that emits a flash of light when it absorbs a ?-ray photon or an energetic particle. Scintillation crystals are widely used as spectroscopic detectors of ionizing radiation in nuclear science, space exploration, medical imaging, homeland security, etc. This thesis is about nonproportional response of...doctoral thesis 2013
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Rogers, E.G. (author)Lanthanide based materials are used in everything from phosphors for light bulbs and LEDs, to scintillators for medical imaging purposes to magnets. They also show potential for spintronics and for increasing the efficiency of solar cells. Knowing the energy of the lanthanide 4f and 5d states is important for understanding the electronic...doctoral thesis 2012
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Cunningham, A.C. (author)Geological evidence of storm surges has the potential to provide vital information on storm-surge risk. Sediment from the coastal dunes of the Netherlands contains evidence of extreme floods that occurred before reliable measurements of water level began. For these sediments to be useful in flood-risk analysis, they need to be reliably dated....doctoral thesis 2011
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Shah, K.S. (author)The focus of this thesis is on new detection technologies that can be used in advancing nuclear medicine modalities, particularly positron emission tomography (PET). Several detection technologies are covered in this thesis. First, new Ce3+ doped rare earth trihalide scintillators that can be used in advancing PET imaging are discussed. Here,...doctoral thesis 2010
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Krumpel, A.H. (author)Many phosphors nowadays are lanthanide (Ln) activated semi-conductor and insulator materials due to their serviceable luminescent properties. Few years ago, an empirical model for semi-conductor and insulator materials with an Ln activator has been developed that not only explains the optical properties of phosphors but helps as well to find...doctoral thesis 2009
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Birowosuto, M.D. (author)In this dissertation, we present bromide and iodide scintillators which have been investigated for the past four years. Three major groups of compounds were studied; lanthanide trihalides LnX3, (pseudo)-elpasolites M2ALnX6 and ternary halides AmLnnXo where M and A are alkali cations, Ln is a rare earth cation and X is a halide anion. Some...doctoral thesis 2008